Shape-resonance-induced non-Franck–Condon effects in (2+1) resonance enhanced multiphoton ionization of the C 3Πg state of O2
- 15 September 1988
- journal article
- letter
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 89 (6), 3923-3925
- https://doi.org/10.1063/1.454869
Abstract
We show that strong non‐Franck–Condon effects observed in (2+1) resonance enhanced multiphoton ionization of the C 3Πg state of O2 are due to the kσu shape resonance previously observed in single‐photon studies of diatomic molecules. Calculated vibrational branching ratios for the v’=2,3 levels of the C 3Πg state are in reasonable agreement with experiment. Certain discrepancies remain in comparing theoretical results with the measured spectra, and possible electron‐correlation effects which underly this are discussed.Keywords
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